Molecular Biology Answers

"membrane bound organelles contain different set of large and small molecules that are involved in metabolic pathways"

Is that true or false?

How are self-replicating molecules, such as RNA molecules in the “RNA World” hypothesis, essential to the most popular hypotheses about the origin of life on Earth?

How are proteins transported out of the enodoplasmic reticulum to the Golgi apparatus?
A. in vesicles
B. on ribosomes
C. through pores
D. through cisternae

What happens to proteins within the endoplasmic reticulum?
A. They are synthesized.
B. They are broken down.
C. They are converted into lipids.
D. They are modified by enzymes.

With the help of an example explain how two allelic pairs affect the same characteristic.

What are the reasons of the different life spans in a given species?

what are the reasons for the absence of thymine in RNA and absence of uracil in DNA?

You have recently isolated and cultured a cancerous cell line from a brain tumor of a patient. You are interested in determining what may be different at the gene expression level between the cancerous cellular tissue and the normal tissue. Design an experiment to characterize the differential gene expression between the two cell types.

What issues would you consider before embarking on a project using a clonal cell line model? What types of functions would be appropriated or inappropriate to study in such a system?

A circular plasmid of 10,000 base pairs (bp) is digested with two restriction enzymes,A and B, to produce a
3000 bp and a 2000 bp bands when visualised on an agarose gel. when digested with one enzyme at a
time,only one band is visible at 5000 bp. If the first site for enzyme A(A1) is present at the 100th base, the
order in which the remaining sites(A2,B1 and B2) are present is?